public JCEECPrivateKey(
String algorithm,
ECPrivateKeyParameters params,
JCEECPublicKey pubKey,
ECParameterSpec spec) {
ECDomainParameters dp = params.getParameters();
this.algorithm = algorithm;
this.d = params.getD();
if (spec == null) {
EllipticCurve ellipticCurve = EC5Util.convertCurve(dp.getCurve(), dp.getSeed());
this.ecSpec =
new ECParameterSpec(
ellipticCurve,
new ECPoint(dp.getG().getX().toBigInteger(), dp.getG().getY().toBigInteger()),
dp.getN(),
dp.getH().intValue());
} else {
this.ecSpec = spec;
}
publicKey = getPublicKeyDetails(pubKey);
}
private void populateFromPrivKeyInfo(PrivateKeyInfo info) {
X962Parameters params = new X962Parameters((DERObject) info.getAlgorithmId().getParameters());
if (params.isNamedCurve()) {
DERObjectIdentifier oid = (DERObjectIdentifier) params.getParameters();
X9ECParameters ecP = ECUtil.getNamedCurveByOid(oid);
if (ecP == null) // GOST Curve
{
ECDomainParameters gParam = ECGOST3410NamedCurves.getByOID(oid);
EllipticCurve ellipticCurve = EC5Util.convertCurve(gParam.getCurve(), gParam.getSeed());
ecSpec =
new ECNamedCurveSpec(
ECGOST3410NamedCurves.getName(oid),
ellipticCurve,
new ECPoint(
gParam.getG().getX().toBigInteger(), gParam.getG().getY().toBigInteger()),
gParam.getN(),
gParam.getH());
} else {
EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), ecP.getSeed());
ecSpec =
new ECNamedCurveSpec(
ECUtil.getCurveName(oid),
ellipticCurve,
new ECPoint(ecP.getG().getX().toBigInteger(), ecP.getG().getY().toBigInteger()),
ecP.getN(),
ecP.getH());
}
} else if (params.isImplicitlyCA()) {
ecSpec = null;
} else {
X9ECParameters ecP = new X9ECParameters((ASN1Sequence) params.getParameters());
EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), ecP.getSeed());
this.ecSpec =
new ECParameterSpec(
ellipticCurve,
new ECPoint(ecP.getG().getX().toBigInteger(), ecP.getG().getY().toBigInteger()),
ecP.getN(),
ecP.getH().intValue());
}
if (info.getPrivateKey() instanceof DERInteger) {
DERInteger derD = (DERInteger) info.getPrivateKey();
this.d = derD.getValue();
} else {
ECPrivateKeyStructure ec = new ECPrivateKeyStructure((ASN1Sequence) info.getPrivateKey());
this.d = ec.getKey();
this.publicKey = ec.getPublicKey();
}
}
